E Snet

ESnet
Data as of 2026-08-09
Registry
Cluster stats
Netblocks75 · 806,945 IPv4 addresses
IPv6 7 prefixes (largest 2a05:7cc0::/30)
Registered in United States (53) · LT (21) · Israel (1) · Luxembourg (1) · Sweden (1)
All fragments 85 blocks across 2 clusters
Cluster ID217988321
RegistryBGP
Customersfind customers using this network →
Evidence & provenance ?
Attribution Registry record
Shared handles clustered on 28 shared RIR contact/maintainer handles
Registry names 5 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

7 weekly snapshots · JSON
84 +10 netblocks since 2026-07-05
2026-07-05 peak 84 2026-08-09

IP Ranges (75)

showing 50 of 75 — see all — ⬇ export CSV
CIDR Org name Registry Status Confidence
77.241.206.23/32 Esnet PEERINGDB ASSIGNED ● high
128.55.0.0/16 ESnet ARIN DIRECT ALLOCATION ● high
130.20.0.0/16 ESnet BGP ANNOUNCED ● high
134.55.0.0/16 ESnet BGP ANNOUNCED ● high
134.167.0.0/16 ESnet BGP ANNOUNCED ● high
192.5.166.0/24 ESnet BGP ANNOUNCED ● high
192.35.193.0/24 ESnet BGP ANNOUNCED ● high
192.73.7.0/24 ESnet BGP ANNOUNCED ● high
192.73.62.0/24 ESnet BGP ANNOUNCED ● high
192.74.210.0/24 ESnet BGP ANNOUNCED ● high
192.74.211.0/24 ESnet ARIN DIRECT ALLOCATION ● high
192.74.212.0/24 ESnet BGP ANNOUNCED ● high
192.74.214.0/23 ESnet BGP ANNOUNCED ● high
192.74.217.0/24 ESnet BGP ANNOUNCED ● high
192.101.100.0/22 ESnet BGP ANNOUNCED ● high
192.101.104.0/22 ESnet BGP ANNOUNCED ● high
192.101.108.0/23 ESnet BGP ANNOUNCED ● high
192.107.175.0/24 ESnet BGP ANNOUNCED ● high
192.124.50.0 – 192.124.59.255 ESnet ARIN DIRECT ALLOCATION ● high
192.124.50.0/23 ESnet BGP ANNOUNCED ● high
192.124.52.0/24 ESnet BGP ANNOUNCED ● high
192.124.52.0/22 ESnet BGP ANNOUNCED ● high
192.124.53.0/24 ESnet BGP ANNOUNCED ● high
192.124.56.0/22 ESnet BGP ANNOUNCED ● high
192.150.242.0/24 ESnet BGP ANNOUNCED ● high
192.188.22.0 – 192.188.41.255 ESnet ARIN DIRECT ALLOCATION ● high
192.188.22.0/24 ESnet BGP ANNOUNCED ● high
192.188.23.0/24 ESnet BGP ANNOUNCED ● high
192.188.24.0/22 ESnet BGP ANNOUNCED ● high
192.188.28.0/24 ESnet BGP ANNOUNCED ● high
192.188.29.0/24 ESnet BGP ANNOUNCED ● high
192.188.31.0/24 ESnet BGP ANNOUNCED ● high
192.188.32.0/23 ESnet BGP ANNOUNCED ● high
192.188.34.0/24 ESnet BGP ANNOUNCED ● high
192.188.37.0/24 ESnet BGP ANNOUNCED ● high
192.188.40.0/23 ESnet BGP ANNOUNCED ● high
198.99.246.0/24 ESnet BGP ANNOUNCED ● high
198.124.0.0/14 ESnet BGP ANNOUNCED ● high
198.128.0.0/14 ESnet BGP ANNOUNCED ● high
198.207.238.0/24 ESnet BGP ANNOUNCED ● high
199.201.153.0/24 ESnet BGP ANNOUNCED ● high
199.201.154.0/24 ESnet BGP ANNOUNCED ● high
199.201.155.0/24 ESnet BGP ANNOUNCED ● high
199.201.157.0/24 ESnet BGP ANNOUNCED ● high
199.201.158.0/24 ESnet BGP ANNOUNCED ● high
2001:400::/32 ESnet BGP ANNOUNCED ● high
2001:1ab8:8486::23/128 Esnet PEERINGDB ASSIGNED ● high
2620:0:50f0::/44 ESnet BGP ANNOUNCED ● high
2620:8f:4001::/48 ESnet BGP ANNOUNCED ● high
85.93.192.0/27 ESNET RIPE ASSIGNED PA ● low

IPv6 ranges (7)

CIDR
2a05:7cc0::/30
2a05:7cc4::/30
2001:400::/32
2a0a:3f00::/33
2620:0:50f0::/44
2620:8f:4001::/48
2001:1ab8:8486::23/128

Domains hosted in this network

what's this?
es.net llnl.gov divxclasico.com

Network trust

what's this?
RPKI hygiene: C how networks compare →
73.8% of checked blocks have valid RPKI ROA coverage (62 of 84)
Possible discrepancies (3)

These blocks are registered to ESnet but cryptographically authorized for a different, unrelated network (3 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

128.55.0.0/16 /16 authorized for AS2936 — National Energy Research Scientific Computing Center
194.17.255.0/24 /24 authorized for AS3301 — Telia Company AB
209.206.24.0/24 /24 authorized for AS13150 — CATO NETWORKS LTD

NIC Handles

AS291 AS292 AS293 AS3425 AS3428 AS3431 AS3443 AS61053 CPP-ARIN DUMY-RIPE DUMY-RIPE EH1-ARIN +16 more